The personal space that's allowable while waiting in line at an ATM. This space changes as you move through the line. In most of the queue, the space is as close as a foot or less, but when you are the next person in line and the person in front of you is using the ATM, it changes to as much as 6 feet to give that person privacy to use the machine

"Some people don't understand that when you get upto the machine, the person behind you needs to give proper ATM space."

The spatial interaction between the person using the ATM and the person standing first in line, who is wanting to use the ATM. (2) The minimal personal space between the person using the ATM and the person wanting to use the ATM. Minimum=2'